/Engine/Source/Runtime/Experimental/Chaos/Public/GeometryCollection/GeometryCollection.h
Builds mesh sections for a given index buffer that could be a subset. Currently, this call assumes that the indices are ordered by MaterialID #todo(dmp): Refactor this and ReindexMaterials to share code
[TArray](API\Runtime\Core\Containers\TArray)< [FGeometryCollectionSection](API\Runtime\Chaos\GeometryCollection\FGeometryCollectionSection) > BuildMeshSections ( const [TArray](API\Runtime\Core\Containers\TArray)< FIntVector > & Indices, const [TArray](API\Runtime\Core\Containers\TArray)< int32 > & BaseMeshOriginalIndicesIndex, [TArray](API\Runtime\Core\Containers\TArray)< FIntVector > & RetIndices ) const